Add VideoLoader.

Change-Id: I0c3019aba6d6a845acaa15559785bed9e2a6b702
TODO: Move MediaFile into AndroidAsync?
Revert "Add VideoLoader."

This reverts commit 27f6bfc4b0bf7007f35a8657675868847acc2a1a.
Revert "Revert "Add VideoLoader.""

This reverts commit 238989181d811678e1e2fc268df696d45524d572.
Do not use VideoLoader prior to SDK Version 12.

Change-Id: I23f8a36c550bc9e1c26a7a6b6ff5ab71d3a1c4b1
Merge remote-tracking branch 'koush/master' into cm-11.0